20 PCA-6751 Series User's Manual
2.4 Parallel port connector (CN2)
The parallel port is normally used to connect the CPU card to a
printer. The PCA-6751 Series includes an on-board parallel port,
accessed through a 26-pin flat-cable connector, CN3. The card comes
with an adapter cable which lets you use a traditional DB-25 connec-
tor. The cable has a 26-pin connector on one end and a DB-25
connector on the other, mounted on a retaining bracket. The bracket
installs at the end of an empty slot in your chassis, giving you access
to the connector.
The parallel port is designated as LPT1, and can be disabled or
changed to LPT2 or LPT3 in the system BIOS setup.
To install the bracket, find an empty slot in your chassis. Unscrew the
plate that covers the end of the slot. Screw in the bracket in place of
the plate. Next, attach the flat-cable connector to CN2 on the CPU
card. Wire 1 of the cable is red or blue, and the other wires are gray.
Make sure that wire 1 corresponds to pin 1 of CN2. Pin 1 is on the
right side of CN2.
2.5 Keyboard lock, LED connector (CN3)
Connecting CN3 enables the keyboard locking function from the front
panel of your chassis.
2.6 USB connector (CN4)
The PCA-6751 Series board provides two USB (Universal Serial Bus)
interfaces, which give complete plug and play and also hot
attach/detach for up to 127 external devices. The USB interfaces
comply with USB specification rev. 1.0 and are fuse protected.
The USB interfaces are accessed through a 10-pin flat-cable connec-
tor, CN9. The adapter cable has a 10-pin connector on one end and a
USB connector on the bracket.
The USB interfaces can be disabled in the system BIOS setup.
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